/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkVotingBinaryHoleFillingImageFilter_h
#define __itkVotingBinaryHoleFillingImageFilter_h

#include "itkVotingBinaryImageFilter.h"
#include "itkArray.h"

namespace itk
{
/** \class VotingBinaryHoleFillingImageFilter
 * \brief Fills in holes and cavities by applying a voting operation on each pixel.
 *
 *
 * \sa Image
 * \sa VotingBinaryImageFilter
 * \sa VotingBinaryIterativeHoleFillingImageFilter
 * \sa Neighborhood
 * \sa NeighborhoodOperator
 * \sa NeighborhoodIterator
 *
 * \ingroup IntensityImageFilters
 * \ingroup ITKLabelVoting
 */
template< class TInputImage, class TOutputImage >
class ITK_EXPORT VotingBinaryHoleFillingImageFilter:
  public VotingBinaryImageFilter< TInputImage, TOutputImage >
{
public:
  /** Extract dimension from input and output image. */
  itkStaticConstMacro(InputImageDimension, unsigned int,
                      TInputImage::ImageDimension);
  itkStaticConstMacro(OutputImageDimension, unsigned int,
                      TOutputImage::ImageDimension);

  /** Convenient typedefs for simplifying declarations. */
  typedef TInputImage  InputImageType;
  typedef TOutputImage OutputImageType;

  /** Standard class typedefs. */
  typedef VotingBinaryHoleFillingImageFilter                         Self;
  typedef VotingBinaryImageFilter< InputImageType, OutputImageType > Superclass;
  typedef SmartPointer< Self >                                       Pointer;
  typedef SmartPointer< const Self >                                 ConstPointer;

  /** Method for creation through the object factory. */
  itkNewMacro(Self);

  /** Run-time type information (and related methods). */
  itkTypeMacro(VotingBinaryHoleFillingImageFilter, VotingBinaryImageFilter);

  /** Image typedef support. */
  typedef typename InputImageType::PixelType  InputPixelType;
  typedef typename OutputImageType::PixelType OutputPixelType;

  typedef typename InputImageType::RegionType  InputImageRegionType;
  typedef typename OutputImageType::RegionType OutputImageRegionType;

  typedef typename InputImageType::SizeType      InputSizeType;
  typedef typename InputImageType::SizeValueType SizeValueType;

  /** Majority threshold. It is the number of pixels over 50% that will decide
   * whether an OFF pixel will become ON or not. For example, if the
   * neighborhood of a pixel has 124 pixels (excluding itself), the 50% will be
   * 62, and if you set upd a Majority threshold of 5, that means that the
   * filter will require 67 or more neighbor pixels to be ON in order to switch
   * the current OFF pixel to ON. The default value is 1. */
  itkGetConstReferenceMacro(MajorityThreshold, unsigned int);
  itkSetMacro(MajorityThreshold, unsigned int);

  /** Returns the number of pixels that changed when the filter was executed. */
  itkGetConstReferenceMacro(NumberOfPixelsChanged, SizeValueType);

#ifdef ITK_USE_CONCEPT_CHECKING
  /** Begin concept checking */
  itkConceptMacro( IntConvertibleToInputCheck,
                   ( Concept::Convertible< int, InputPixelType > ) );
  itkConceptMacro( UnsignedIntConvertibleToInputCheck,
                   ( Concept::Convertible< unsigned int, InputPixelType > ) );
  /** End concept checking */
#endif
protected:
  VotingBinaryHoleFillingImageFilter();
  virtual ~VotingBinaryHoleFillingImageFilter() {}
  void PrintSelf(std::ostream & os, Indent indent) const;

  /** Make protected the methods SetBirthThreshold() and
   * SetSurvivalThreshold() so users of this filter do not have access to
   * them. */
  void SetBirthThreshold(const unsigned int value)
  { this->Superclass::SetBirthThreshold(value);  }
  void SetSurvivalThreshold(const unsigned int value)
  { this->Superclass::SetSurvivalThreshold(value);  }

  /** VotingBinaryHoleFillingImageFilter can be implemented as a multithreaded filter.
   * Therefore, this implementation provides a ThreadedGenerateData()
   * routine which is called for each processing thread. The output
   * image data is allocated automatically by the superclass prior to
   * calling ThreadedGenerateData().  ThreadedGenerateData can only
   * write to the portion of the output image specified by the
   * parameter "outputRegionForThread"
   *
   * \sa ImageToImageFilter::ThreadedGenerateData(),
   *     ImageToImageFilter::GenerateData() */
  void ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread,
                            ThreadIdType threadId);

  /** Methods to be called before and after the invokation of
   * ThreadedGenerateData(). */
  void BeforeThreadedGenerateData();

  void AfterThreadedGenerateData();

private:
  VotingBinaryHoleFillingImageFilter(const Self &); //purposely not implemented
  void operator=(const Self &);                     //purposely not implemented

  unsigned int m_MajorityThreshold;

  SizeValueType m_NumberOfPixelsChanged;

  // Auxiliary array for multi-threading
  Array< SizeValueType > m_Count;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkVotingBinaryHoleFillingImageFilter.hxx"
#endif

#endif
